Device for administering fluid drugs, in particular for infusion
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United States of America Patent
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Aug 20, 1991
Grant Date -
N/A
app pub date -
May 22, 1989
filing date -
Jul 31, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a device and a process for administering a liquid g preparation, in particular by infusion, by implantation or percutaneously, at a given flow rate for relatively long period of time, using a technique involving the retractation of an elastic membrane. More specifically, using this technique, said drug preparation is placed in a tubular reservoir (13) where it is subjected to the action of at least one movable wall (112, 112a). The movable wall is displaced by the pressure of a hydraulic fluid (10), the entry of which is controlled by a capillary tube (4) fed with hydraulic fluid (10) under pressure by a hydraulic accumulator subject to the thrust of a previously dilated retractable elastic membrane (8).
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